Warning sign from a Cambodian mine field.
Each year, an estimated 10,000 people are killed or maimed by land mines. There are believed to be some 100 million mines buried in 62 countries -- and most of those countries are no longer at war. Cambodia is one of the most heavily mined countries. Producer Stephen Smith of Minnesota Public Radio travels to Cambodia and reports on the latest efforts to clear deadly mines, in a place where people are still living in fear.